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I change this to web-cyradm config.

$csp_dsn = 'mysql://user:password@localhost/email_users';

I m not sure how to edit this string to match with web-cyradm.

$lookup_password_query = 'SELECT count(*) FROM users WHERE username =
"%1" AND crypt_password = %4';

$password_update_queries = array(
            'UPDATE users SET crypt_password = %4 WHERE username = "%1"',

);

What type of encryption should be match with web-cyradm "crypt" option.

   // password_encryption
   //
   // What encryption method do you use to store passwords
   // in your database?  Please use one of the following,
   // exactly as you see it:
   //
   //   NONE          Passwords are stored as plain text only
   //   MYSQLPWD      Passwords are stored using the MySQL password() function
   //   MYSQLENCRYPT  Passwords are stored using the MySQL encrypt() function
   //   PHPCRYPT      Passwords are stored using the PHP crypt() function
   //   MD5CRYPT      Passwords are stored using encrypted MD5 algorithm
   //   MD5           Passwords are stored as MD5 hash
   //
   $password_encryption = 'MYSQLPWD';

And i m lack of knowledge on this part to integrate with web-cyradm....

 // csp_salt_query
   // csp_salt_static
   //
   // Encryption types that need a salt need to know where to get
   // that salt.  If you have a constant, known salt value, you
   // should define it in $csp_salt_static.  Otherwise, leave that
   // value empty and define a value for the $csp_salt_query.
   //
   // Leave both values empty if you do not need (or use) salts
   // to encrypt your passwords.
   //
   // The query should return one value (one row, one column) which
   // is the salt value for the current user's password.  This
   // query is ignored if $csp_salt_static is anything but empty.
   //
   //   %1 in this query will be replaced with the full username
   //      (including domain), such as "jose at example.com"
   //   %2 in this query will be replaced with the username (without
   //      any domain portion), such as "jose"
   //   %3 in this query will be replaced with the domain name,
   //      such as "example.com"
   //
   //$csp_salt_static = 'LEFT(crypt_password, 2)';
   //$csp_salt_static = '"a4"';  // use this format with MYSQLENCRYPT
   //$csp_salt_static = '$2$blowsomefish$';  // use this format with PHPCRYPT
   $csp_salt_static = '';

   //$csp_salt_query = 'SELECT SUBSTRING_INDEX(crypt_password, '$', 1)
FROM users WHERE username = "%1"';
   //$csp_salt_query = 'SELECT SUBSTRING(crypt_password,
(LENGTH(SUBSTRING_INDEX(crypt_password, '$', 2)) + 2)) FROM users
WHERE username = "%1"';
   $csp_salt_query = 'SELECT salt FROM users WHERE username = "%1"';
   //$csp_salt_query = '';


Thanks advance for help..